The St. Louis Post-Dispatch reports 20 year-old Shelby Dasher of Affton is in custody at the St. Louis County Justice Center.  The body of her son, Tyler Dasher, was found Tuesday afternoon at the edge of a wooded cemetery near the River Des Peres just blocks from the Dasher home.

St. Louis County Prosecutor Robert McCulloch has called a media conference for 3:15.

Police have not released details of the arrest, and no charges have been filed.